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p and q ( ) have (except 1) no common divisor.
à
· = 2 = 
à
2 = 
à
= = where as q has to be 1 because if it was not,
would not result.
à
p is a whole number.
A whole number “multiplied by itself” does not result in
2.
So is, but out of l.
Roots of square numbers are not irrational ( I).
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